private static void OnMouseMove(object sender, MouseEventArgs e)
{
if (_startPosition == null || e.LeftButton != MouseButtonState.Pressed)
{
return;
}
var adapter = GetSelectorAdapter(sender as Selector);
if (!isDragDistanceFulfilled(e.GetPosition(adapter.Selector)))
{
return;
}
// pick up data and start dragging
var data = new Data
{
SenderDataContext = adapter.Selector.DataContext,
SelectedItems = new ArrayList(adapter.GetSelectedItems()), // must be a copy
TargetIndex = -1
};
_dropData = new DataObject(data);
_startPosition = null;
_senderAdapter = adapter;
adapter.OnDragStarted();
DragDrop.DoDragDrop(adapter.Selector, _dropData, DragDropEffects.Copy | DragDropEffects.Move);
e.Handled = true;
}
private static double getDragScrollOffset(ASelectorAdapter adapter)
{
if (adapter.Selector is DataGrid)
{
return(DRAG_SCROLL_OFFSET_DATAGRID);
}
else if (adapter.Selector is ListBox)
{
return(DRAG_SCROLL_OFFSET_LISTBOX);
}
return(1);
}
private static void SetSelectorAdapter(Selector d, ASelectorAdapter value)
{
d.SetValue(SelectorAdapterProperty, value);
}